Calling This Function

I'm currently trying to manipulate TShape objects over multiple classes, I had a problem with #includes and now that is sorted, the only thing i'm trying to do is create shapes on one form from another class, by creating the function and then calling it in my main class, here's my code:

Well, possibly you need to acquire knowledge about defining and using structures with functions? It doesn't look like a learning example. I recommend to first learn the basics and only after that begin to work on complex use cases.